Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:08:51

Orbital Elements for A2993AB

WDS:	A2993AB	WDS ID/Discoverer
P:	65.200	Orbital period (years)
a:	0.141	Semi-major axis (arcseconds)
i:	126.9	Inclination (degrees)
Ω:	166.0	Longitude of ascending node (degrees)
T:	2028.200	Epoch of periastron passage (year)
e:	0.645	Eccentricity
ω:	40.0	Longitude of periastron (degrees)
Start-Year:	1993.0	Year
End-Year:	2057.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2993AB

Position:	194723.94-014828.8	Epoch-2000 right ascension and declination
WDS-ID:	19474-0148	WDS designation
Discoverer Code:	A2993AB	Discover designation and components
ADS number:	12294	Aitken Double Star catalog
HD number:	186949	HD catalog number
Hipparcos number:	97367	Hipparcos catalog number
V1:	9.06	Magnitude of the primary
V2:	9.09	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for A2993AB

WDS 6th Orbit including measures of A2993AB

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of A2993AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.064    192.9
-------------------------
1993.0     0.204    322.5
1994.0     0.202    321.3
1995.0     0.200    320.0
1996.0     0.198    318.7
1997.0     0.195    317.4
1998.0     0.193    316.1
1999.0     0.189    314.7
2000.0     0.186    313.3
2001.0     0.182    311.8
2002.0     0.178    310.3
2003.0     0.174    308.6
2004.0     0.169    306.9
2005.0     0.164    305.1
2006.0     0.159    303.2
2007.0     0.154    301.1
2008.0     0.148    298.9
2009.0     0.143    296.5
2010.0     0.137    294.0
2011.0     0.131    291.1
2012.0     0.125    288.1
2013.0     0.118    284.6
2014.0     0.112    280.8
2015.0     0.106    276.6
2016.0     0.100    271.8
2017.0     0.094    266.4
2018.0     0.088    260.3
2019.0     0.083    253.3
2020.0     0.078    245.5
2021.0     0.074    236.7
2022.0     0.070    226.9
2023.0     0.068    216.3
2024.0     0.066    205.0
2025.0     0.064    192.9
2026.0     0.060    179.9
2027.0     0.055    164.7
2028.0     0.045    144.5
2029.0     0.036    112.5
2030.0     0.036     70.3
2031.0     0.048     39.8
2032.0     0.063     22.9
2033.0     0.079     12.9
2034.0     0.094      6.2
2035.0     0.108      1.2
2036.0     0.120    357.3
2037.0     0.131    354.2
2038.0     0.142    351.5
2039.0     0.151    349.1
2040.0     0.159    347.0
2041.0     0.166    345.1
2042.0     0.173    343.3
2043.0     0.179    341.7
2044.0     0.184    340.2
2045.0     0.189    338.7
2046.0     0.193    337.3
2047.0     0.196    336.0
2048.0     0.199    334.7
2049.0     0.201    333.5
2050.0     0.203    332.2
2051.0     0.205    331.0
2052.0     0.206    329.8
2053.0     0.207    328.6
2054.0     0.207    327.5
2055.0     0.207    326.3
2056.0     0.206    325.1

Disclaimer

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.